As an off the wall guess though it looks like your trying to force beta your lighting values far beyond their limitations that is causing the lighting solution to bleed.
Unity directional light bleeding through wall.
You can simulate this in shaders or use raycasts to see if the light is behind a wall.
It will pay dividends to learn how they work what the settings do and how to work around problems like this.
Shadows are the obvious answer however i assume you are using lite and that s not an option.
I have found that when i disable the directional light and use the gaia light presets the bleed through issue goes away.
I am having a strange problem with light bleeding through my meshes and causing light lines in the shadows see this image it was working great press j to jump to the feed.
This is caused because the use inverse squared falloff is set to on by default forcing you to have to use way more lights than whats needed or to set it s value far outs side acceptable values.
I m not sure if you are familiar with gaia but you create a new scene which adds a default directional light and default terrain.
I believe this has something to do with culling masks or light culling.
Place it just behind your wall so that it blocks the light from leaking out.
Shadow maps are a kind of fickle technology.
That s why shadows exist.
If a light is next to a wall on one side you can see it on the floor on the other side.
Help how to solve light leaking through the wall.
In that case you ll need to be a bit more clever.
Note that this will take a long time depending on the size of your scene and the number of lights 3.
Any help is greatly appreciated.
These options have obvious edge cases that can t be easily resolved.
Position these to block any light leaking through the bottoms of walls.
You can start here in the unity manual.
Press question mark to learn the rest of the keyboard shortcuts.
When i change the buildings walls to static nothing changes.
I was wondering how i could go about culling the lights so they no longer shine through walls.
In some situations normal bias can cause an unwanted effect called light bleeding where light bleeds through from nearby geometry into areas that should be shadowed.
